question #2 Sahih Muslim 135b, Book 1, Hadith 255 : How does the concept of truthfulness relate to the credibility of religious narrations?

The people will constantly, and the rest of the hadith is the same as that transmitted by ‘Abdul-Warith with the exception that there is no mention of the Messenger of Allah in that, but he observed at the end of the hadith: Allah and His Messenger told the truth.